It would take approx 1 million years for a CD to completely decompose in a landfill.
Think about it ...............
 If you have creative mind +  piles of old CDs or DVds lying around your house or elsewhere  you may get inspired by a magnificent work of French artist Elise Morin and architect Clémence Eliard. They  hand-sewed together 65,000  unsold (and unwanted)  CDs  to create an enormous 500-squere meter dune like metallic  landscape, so-called ‘Wastelandscape’ which overtakes the ‘Halle D’aubervilliers’ of Paris’s centquatre. After the exhibition, every single CD will be recycled into polycarbonate. 

 Watch the installation video here